Virtual machine configuration for running CrystalM2 Server

user_data.sh

export DEBIAN_FRONTEND=noninteractive

# Update all system packages
apt-get update && apt-get -y upgrade

# Install X Windows and a basic window manager
apt-get install -q -y              \
  debconf                          \ # Bundles dpkg-reconfigure
  xorg openbox obmenu              \ # Openbox and friends
  xauth x11-apps x11-xserver-utils \ # Xorg and friends
  lightdm                          \ # Login manager
  tightvncserver                   \ # VNC server for remote access to the desktop
  git                              \ # For cloning the M2 server's code
  zip unzip                          # Archive management

# Harden the system a little with fail2ban
apt-get install -q -y fail2ban sendmail-bin \
  sendmail # For sending e-mail notifications for failed connections

# Instantiate local settings for fail2ban
cp /etc/fail2ban/fail2ban.conf /etc/fail2ban/fail2ban.local
cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local

# Install tools for building C# applications on Linux
apt-get install -q -y mono-xbuild \ # For building the server software
  mono-devel                      \ # Required libraries
  gawk                              # GNU awk

# Create the script for VNC startup (this will be run by users later)
echo '
#!/bin/bash
xrdb $HOME/.Xresources
openbox &' > /opt/xstartup

chmod 777 /opt/xstartup

# Set up a swapfile
fallocate -l 1G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo "/swapfile swap swap defaults 0 0" >> /etc/fstab